Element, Compound, Mixture - 6th

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What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and gold (Au).

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What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. An example is salt (NaCl), which is made of sodium (Na) and chlorine (Cl).

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded. Each substance retains its own properties. An example is a salad.

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What is the difference between a mixture and a compound?

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A mixture is made of two or more substances that are not chemically combined, while a compound is made of two or more elements that are chemically bonded.

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What is a solution?

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A solution is a type of mixture where one substance (the solute) is dissolved in another (the solvent). An example is sugar dissolved in water.

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Can a mixture be separated?

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Yes, mixtures can be separated into their individual components by physical means, such as filtering or sorting.

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What is an example of a homogeneous mixture?

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A homogeneous mixture has a uniform composition throughout. An example is saltwater, where the salt is evenly distributed in the water.

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What is an example of a heterogeneous mixture?

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A heterogeneous mixture has a non-uniform composition. An example is a salad, where the different ingredients can be seen and separated.

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What is the chemical formula for table salt?

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The chemical formula for table salt is NaCl, which indicates it is a compound made of sodium and chlorine.

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What is a molecule?

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A molecule is the smallest unit of a chemical compound that retains its chemical properties. It is made up of two or more atoms bonded together.